In SRAM you get Leakage + Switching current. For cases like a cache where you're going to be constantly churning bits this can drive up power quite a bit. I do

In SRAM you get Leakage + Switching current. For cases like a cache where you're going to be constantly churning bits this can drive up power quite a bit. I don't claim to be an expert so there are probably cases where it's lower. However when I was looking into fast RAM for storing data from an FPGA for a simple Logic Analyzer most of the SRAM was almost 2-4x what DRAM was for power consumption at the same storage size(with SRAM being a blazing fast cycle access).